[ENHANCEMENT] Limit provide description field max length

[fershad]

Currently, anyone submitting a verification request can write a suuuuuuuuuuuppppper long description of their company. These are visible by default on the Directory, and could be used for keyword stuffing/sales & marketing ... which isn't the purpose of our Directory.

Proposed solution

Limit the length of content that can entered into the description form field in a provider update/verification request. Picking an number out of the sky, 1000 seems like a reasonable character limit.

This would be a frontend validation, and would should stop the form from submitting. However, because we're using a multi-step form, I'm not sure how that would work - does the user have to go through all the steps before they'd get an error for the description being too long on submission?